rti 150 crossover question

gmb2428
gmb2428 Posts: 40
While hooking up my rti 150's I decided to take a ohm measurement over the speaker terminals while the biamp jumpers were removed. To my supprize, the lower terminals were 4ohms, and the top for the mids/highs show an open circuit! Well they work fine so why do the top terms show open??? Must be something going on in the crossover I dont understand. Also if the 3 subs measure 4ohms why did polk rate these speaks at 8 ohm imp??? They are so hard to drive im going to have to jump up and buy a sep amp to drive them.

And I wanted to mention I biamped them with my yamaha rxv1900 with 130w x 7, then I hooked them up the regular way and cant tell any audible difference. So what gives. What does it take for biamping to be any noticable difference???
Post edited by gmb2428 on

Comments

  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited July 2009
    I'm sure there's a cap in series that blocks the bass to the tweeter. Rti150 speaker are nice, but are a **** to power them up. :)

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  • Face
    Face Posts: 14,340
    edited July 2009
    That's not the correct way to measure a speaker's impedance, all you're doing is measuring the voice coil's resistance. As Joe mentioned, there is no continuity across the top terminals due to a cap in series with the tweeter.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche